SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 03/18/08                         |
--------------------------------------------------------------| NONREPORTABLE
      NON-COMMERCIAL      |   COMMERCIAL    |      TOTAL      |   POSITIONS
--------------------------|-----------------|-----------------|-----------------
  LONG  | SHORT  |SPREADS |  LONG  | SHORT  |  LONG  | SHORT  |  LONG  | SHORT
--------------------------------------------------------------------------------
(CONTRACTS OF 25 U.S. EPA SO2 EMMISSION              OPEN INTEREST:       27,310
COMMITMENTS
   9,677    4,393      982   16,449   21,571   27,108   26,946      202      364

CHANGES FROM 03/11/08 (CHANGE IN OPEN INTEREST:      3,019)
     151    1,676      122    2,685    1,000    2,958    2,798       61      221

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    35.4     16.1      3.6     60.2     79.0     99.3     98.7      0.7      1.3

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       30)
       9        8        8       11       12       24       24
 

Updated March 21, 2008